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Charge-selective transport of organic and protein analytes through synthetic nanochannels

Nguyen, Quoc Hung ; Ali, Mubarak ; Bayer, Veronika ; Neumann, Reinhard ; Ensinger, Wolfgang (2010)
Charge-selective transport of organic and protein analytes through synthetic nanochannels.
In: Nanotechnology, 21 (36)
Article, Bibliographie

Abstract

We present an experimental demonstration of a synthetic nanoporous membrane suitable for charge-selective transport of ionic species. The surfaces and walls of synthetic nanochannels, fabricated in heavy ion-tracked polyethylene terephthalate membranes are negatively charged due to the presence of carboxylate moieties. These nanofilters discriminate and gate the transport of cations while inhibiting the passage of anions. The permselectivity of these membranes is reversed by converting the carboxylic moieties into terminated amino groups. The positively charged (aminated) membranes facilitate the transport of anions. Based on the same principle, charged biomolecules (bovine serum albumin and lysozyme) are successfully filtered through these membranes. These membranes also exhibit the phenomenon of ion concentration polarization.

Item Type: Article
Erschienen: 2010
Creators: Nguyen, Quoc Hung ; Ali, Mubarak ; Bayer, Veronika ; Neumann, Reinhard ; Ensinger, Wolfgang
Type of entry: Bibliographie
Title: Charge-selective transport of organic and protein analytes through synthetic nanochannels
Language: English
Date: 10 September 2010
Publisher: IOP Publishing
Journal or Publication Title: Nanotechnology
Volume of the journal: 21
Issue Number: 36
URL / URN: http://iopscience.iop.org/0957-4484/21/36/365701/
Abstract:

We present an experimental demonstration of a synthetic nanoporous membrane suitable for charge-selective transport of ionic species. The surfaces and walls of synthetic nanochannels, fabricated in heavy ion-tracked polyethylene terephthalate membranes are negatively charged due to the presence of carboxylate moieties. These nanofilters discriminate and gate the transport of cations while inhibiting the passage of anions. The permselectivity of these membranes is reversed by converting the carboxylic moieties into terminated amino groups. The positively charged (aminated) membranes facilitate the transport of anions. Based on the same principle, charged biomolecules (bovine serum albumin and lysozyme) are successfully filtered through these membranes. These membranes also exhibit the phenomenon of ion concentration polarization.

Divisions: 11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 24 Aug 2010 15:45
Last Modified: 05 Mar 2013 09:36
PPN:
Funders: Q H Nguyen thanks the Gottlieb Daimler- und Karl Benz- Stiftung for financial support., M Ali and W Ensinger acknowledge financial support by the Beilstein-Institut, Frankfurt/Main, Germany, within the research collaboration NanoBiC.
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